Results 51 to 60 of about 7,287 (173)

Direct-sequence spread-spectrum ultrasonic testing device

, 1995
Techniques for providing an ultrasonic flaw detection system are disclosed. A continuous wave of wide-band direct-sequence spread-spectrum signals continuously drives one or more transmitting transducers, thereby flooding a test object with coded ...
Wormley, Samuel, Papadakis, Emmanuel, Russell, Steve   +2 more
core  

Period Estimation of Spread Spectrum Codes Based on ResNet. [PDF]

Sensors (Basel), 2023
Gu HQ, Liu XX, Xu L, Zhang YJ, Lu ZM.
europepmc   +1 more source

An eigenstructure technique for direct sequence spread spectrum synchronization

, 2009
An important aspect of all spread spectrum receivers is synchronization. The harsh radio environment has necessitated the development of fast and robust techniques.
Mangalvedhe, Nitin R.
core  

Spread spectrum training and development [PDF]

, 2004
Spread Spectrum communication system has been evolving rapidly since it was first commercialized by FCC (Federal Communication Commission). One of the techniques, which is Direct Sequence Spread Spectrum (DSSS), is widely used in CDMA system. In DSSS, a
Lukie., Marietta Rachel
core  

Blind estimation of pseudo‐random codes in periodic long code direct sequence spread spectrum signals

, 2016
An estimation method of pseudo-random (PN) codes in the periodic long code direct sequence spread spectrum signals using a pair of spreading code and scrambling code [i.e.
Zhao, Zhijin, Gu, Xiaowei, Shen, Lei
core   +1 more source

Gaussian-Distributed Spread-Spectrum for Covert Communications. [PDF]

Sensors (Basel), 2023
Shakeel I, Hilliard J, Zhang W, Rice M.
europepmc   +1 more source

Research on Direct Spread Spectrum Sequence Synchronization Technology for Underwater Acoustic Multi-User Positioning Systems

CNML
The underwater acoustic positioning system faces challenges in the complex and dynamic underwater environment and limited frequency band resources. Expanding the frequency band range through hardware enhancement is costly and challenging.
Haoyang Zhu, Youwen Zhang
semanticscholar   +1 more source

Performance evaluation and mathematical analysis of direct sequence and frequency hopping spread spectrum systems under wideband interference

, 2018
This paper presents performance evaluation and comparison analysis of Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS) systems.
Elvan Yuniarti, Widiyatmoko, Bambang, Kurniawan, Edi, Fawzan Ghalib Abdul Karim Bawahab, Bayuwati, Dwi, Bambang Widiyatmoko, Edi Kurniawan, Bawahab, Fawzan Ghalib Abdul Karim, Dwi Bayuwati, Yuniarti, Elvan   +9 more
core   +2 more sources

Modulation Signal Recognition of Underwater Acoustic Communication Based on Archimedes Optimization Algorithm and Random Forest. [PDF]

Sensors (Basel), 2023
Wang M, Zhu Z, Qian G.
europepmc   +1 more source

Interception techniques for direct sequence spread spectrum signals

, 2005
In this work interception and spreading sequence estimation of Direct Sequence Spread Spectrum (DSSS) signals, in low signal to noise power ratios is discussed.
UYGAR KARADENİZ
core